File size: 3,148 Bytes
4bcc2be | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 | // Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package subtle
import (
"testing"
"testing/quick"
)
type TestConstantTimeCompareStruct struct {
a, b []byte
out int
}
var testConstantTimeCompareData = []TestConstantTimeCompareStruct{
{[]byte{}, []byte{}, 1},
{[]byte{0x11}, []byte{0x11}, 1},
{[]byte{0x12}, []byte{0x11}, 0},
{[]byte{0x11}, []byte{0x11, 0x12}, 0},
{[]byte{0x11, 0x12}, []byte{0x11}, 0},
}
func TestConstantTimeCompare(t *testing.T) {
for i, test := range testConstantTimeCompareData {
if r := ConstantTimeCompare(test.a, test.b); r != test.out {
t.Errorf("#%d bad result (got %x, want %x)", i, r, test.out)
}
}
}
type TestConstantTimeByteEqStruct struct {
a, b uint8
out int
}
var testConstandTimeByteEqData = []TestConstantTimeByteEqStruct{
{0, 0, 1},
{0, 1, 0},
{1, 0, 0},
{0xff, 0xff, 1},
{0xff, 0xfe, 0},
}
func byteEq(a, b uint8) int {
if a == b {
return 1
}
return 0
}
func TestConstantTimeByteEq(t *testing.T) {
for i, test := range testConstandTimeByteEqData {
if r := ConstantTimeByteEq(test.a, test.b); r != test.out {
t.Errorf("#%d bad result (got %x, want %x)", i, r, test.out)
}
}
err := quick.CheckEqual(ConstantTimeByteEq, byteEq, nil)
if err != nil {
t.Error(err)
}
}
func eq(a, b int32) int {
if a == b {
return 1
}
return 0
}
func TestConstantTimeEq(t *testing.T) {
err := quick.CheckEqual(ConstantTimeEq, eq, nil)
if err != nil {
t.Error(err)
}
}
func makeCopy(v int, x, y []byte) []byte {
if len(x) > len(y) {
x = x[:len(y)]
} else {
y = y[:len(x)]
}
if v == 1 {
copy(x, y)
}
return x
}
func constantTimeCopyWrapper(v int, x, y []byte) []byte {
if len(x) > len(y) {
x = x[:len(y)]
} else {
y = y[:len(x)]
}
v &= 1
ConstantTimeCopy(v, x, y)
return x
}
func TestConstantTimeCopy(t *testing.T) {
err := quick.CheckEqual(constantTimeCopyWrapper, makeCopy, nil)
if err != nil {
t.Error(err)
}
}
var lessOrEqTests = []struct {
x, y, result int
}{
{0, 0, 1},
{1, 0, 0},
{0, 1, 1},
{10, 20, 1},
{20, 10, 0},
{10, 10, 1},
}
func TestConstantTimeLessOrEq(t *testing.T) {
for i, test := range lessOrEqTests {
result := ConstantTimeLessOrEq(test.x, test.y)
if result != test.result {
t.Errorf("#%d: %d <= %d gave %d, expected %d", i, test.x, test.y, result, test.result)
}
}
}
var benchmarkGlobal uint8
func BenchmarkConstantTimeSelect(b *testing.B) {
x := int(benchmarkGlobal)
var y, z int
for range b.N {
y, z, x = ConstantTimeSelect(x, y, z), y, z
}
benchmarkGlobal = uint8(x)
}
func BenchmarkConstantTimeByteEq(b *testing.B) {
var x, y uint8
for i := 0; i < b.N; i++ {
x, y = uint8(ConstantTimeByteEq(x, y)), x
}
benchmarkGlobal = x
}
func BenchmarkConstantTimeEq(b *testing.B) {
var x, y int
for i := 0; i < b.N; i++ {
x, y = ConstantTimeEq(int32(x), int32(y)), x
}
benchmarkGlobal = uint8(x)
}
func BenchmarkConstantTimeLessOrEq(b *testing.B) {
var x, y int
for i := 0; i < b.N; i++ {
x, y = ConstantTimeLessOrEq(x, y), x
}
benchmarkGlobal = uint8(x)
}
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